<p>Judith Chase Gilbert, of Arlington, Va., is loaded into a PET scanner at Georgetown University Hospital in Washington, D.C., May 19.</p>
May 27, 2015
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May 27, 2015 9 p.m.
Study peeks into healthy brains to hunt Alzheimer's culprit
New imaging can spot tangles in living brains
WASHINGTON - Sticky plaque gets the most attention, but now healthy seniors at risk for Alzheimer's are letting scientists peek into their brains to see if another culprit is lurking.